Estructura de la corteza en el centro peninsular mediante el análisis espectral de datos gravimétricos y modelización en 2+1/2D

El análisis espectral de las anomalías de Bouguer del centro peninsular ha puesto de manifiesto la existencia de dos discontinuidades corticales situadas a unas profundidades medias de 29,2±1,7 y 8,2±0,4 km. De acuerdo con los datos sísmicos, la discontinuidad más profunda representa el Moho y la más superficial está situada dentro de la corteza superior. Mediante la inversión en el dominio de las frecuencias de la anomalía regional, se ha elaborado un modelo tridimensional del Moho. Su geometría está caracterizada por una depresión con las mayores profundidades dispuestas según una orientación NO-SE, alcanzando valores próximos a 30 km. Por tanto, la corteza en esta zona se encuentra ligeramente engrosada, descendiendo el Moho bajo las áreas centrales del Sistema Central y sus márgenes con las Cuencas del Duero y del Tajo. Hacia los extremos de la cadena el espesor de la corteza disminuye. En los modelos gravimétricos transversales al Sistema Central realizados, la estructura de la cadena aparece definida como un bloque cortical elevado en el que el límite corteza superior-corteza media asciende en sentido transversal a la cadena, adquiriendo una forma arqueada. El límite con las Cuencas del Duero y del Tajo corresponde a dos fallas inversas de buzamientos próximos a 50°, asociados a gradientes gravimétricos de dirección NE-SO bien marcados. El modelo gravimétrico longitudinal muestra el carácter heterogéneo de la corteza superior en el Sistema Central. Estas heterogeneidades están relacionadas con dominios establecidos en el basamento hercínico de forma que la densidad de los materiales disminuye hacia la zona occidental. Aunque tanto el análisis espectral de los datos gravimétricos como la modelización sugieren la existencia de un engrosamiento bajo el Sistema Central, éste se encuentra circunscrito a la zona central y es menor que el propuesto por los modelos sísmico

The early thermal and magnetic state of the cratered highlands of Mars

Surface heat flows are calculated from elastic lithosphere thicknesses for the heavy cratered highlands of Mars, in terms of the fraction of the surface heat flow derived from crustal heat sources. Previous heat flow estimations for Mars used linear thermal gradients, which is equivalent to ignoring the existence of heat sources within the crust. We compute surface heat flows following a methodology that relates effective thickness and curvature of an elastic plate with the strength envelope of the lithosphere, and assuming crustal heat sources homogeneously distributed in a radioactive element-rich layer 20 or 60 km thick. The obtained results show that the surface heat flow increases with the proportion of heat sources within the crust, and with the decrease of both radioactive element-rich layer thickness and surface temperature. Also, the results permit us to calculate representative temperatures for the crust base, rock strength for the upper mantle, and lower and upper limits to the crustal magnetization depth and intensity, respectively. For Terra Cimmeria, an effective elastic thickness of 12 km implies between 30% and 80% of heat sources located within the crust. In this case the uppermost mantle would be weak at the time of loading, and temperatures in the lower crust cold enough to favor unrelaxed crustal thickness variations and to permit deep Curie depths in the highlands, as suggested by the observational evidence

Tectónica y relieve en el centro de la Península Ibérica

Depto. de Geodinámica, Estratigrafía y PaleontologíaFac. de Ciencias GeológicasTRUEpu

Evaluating the Structural Effects of a Big Cultural Event: The Case of The International Expo Zaragoza 2008

In the summer of 2008, the International Expo Zaragoza 2008 “Water and Sustainable Development” was held in Zaragoza (Aragon, Spain). This project was expected to modernize the city and transform the Aragonese economy, with positive long-term effects on production and employment. The aim of this paper is to analyze these effects from an economic perspective, analyzing the impacts produced by the investments and tourism expenditures associated with this Expo and the structural changes, measured by forward and backward linkages and dependence graphs. Our results suggest that the small and non-permanent structural transformations are balanced by the negative effects of the international crisis

Análisis cuantitativo de la fracturación tardihercínica en la Rama Aragonesa de la Cordillera Ibérica

From the e/K' diagram, the late-hercynian deformational regime is deduced in the Iberian Range Eastern branch. An evolution from reverse strike-slip tectonics to radial extension related to dyke emplacement (Hiendelaencina Phase) is proposed. Tejero R. y de Vicente, G. (1987): Análisis cuantitativo de la fracturación tardihercínica en la Rama Aragonesa de la Cordillera Ibérica. Geogaceta, 2, 14-17

The early thermal and magnetic state of the cratered highlands of Mars. Earth

Abstract Surface heat flows are calculated from elastic lithosphere thicknesses for the heavy cratered highlands of Mars, in terms of the fraction of the surface heat flow derived from crustal heat sources. Previous heat flow estimations for Mars used linear thermal gradients, which is equivalent to ignoring the existence of heat sources within the crust. We compute surface heat flows following a methodology that relates effective thickness and curvature of an elastic plate with the strength envelope of the lithosphere, and assuming crustal heat sources homogeneously distributed in a radioactive element-rich layer 20 or 60 km thick. The obtained results show that the surface heat flow increases with the proportion of heat sources within the crust, and with the decrease of both radioactive element-rich layer thickness and surface temperature. Also, the results permit us to calculate representative temperatures for the crust base, rock strength for the upper mantle, and lower and upper limits to the crustal magnetization depth and intensity, respectively. For Terra Cimmeria, an effective elastic thickness of 12 km implies between 30% and 80% of heat sources located within the crust. In this case the uppermost mantle would be weak at the time of loading, and temperatures in the lower crust cold enough to favor unrelaxed crustal thickness variations and to permit deep Curie depths in the highlands, as suggested by the observational evidence.

Wearables, IoT, and Big Data: The new revolution in cognitive science

A new revolution in cognitive science is now possible thanks to portable devices enabled to measure physiological variables non-intrusively, the Internet of Things that allows information to be collected and stored in real time from different locations, and big data techniques for identifying patterns that can be used to make decisions, predict behavior or create machine learning and artificial intelligence models. Research supported by these technologies will provide valuable insights into the impact that environmental circumstances have on the cognitive processes involved in different tasks, and how this can be detected through biological markers

Biosensado con redes de nanoagujeros en oxido de aluminio

Se presenta la explotación analítica de redes de nanoagujeros de óxido de aluminio fabricados sobre sustratos de policarbonato.1 Este novedoso dispositivo se basa en la resonancia de plasmón superficial para monitorizar procesos de bioreconocimiento sin marcaje. El bajo coste de los materiales empleados (policarbonato y aluminio) y la compatibilidad de este dispositivo con las tecnologías de disco compacto encierra un gran potencial para el desarrollo de biosensores